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FCP 5.1.2 upgrade problems (artifacts) with colour corrector at 10 Bit
I have upgraded a number of FCP online suites to FCP version 5.1.2 and when we use the FCP color corrector in a 10 bit sequence and render 10-bit material in high precision YUV we get interesting artifacts in the high lights on the grade one monitor. This problem is on all 4 online suites is this a known 5.1.2 upgrade bug or is a Kona 3 problem? All the G5’s are Quad 2.5 GHz Power PCs (non intel) 4.5 GB of RAM, QT version 7.1.3, OSX 10.4.7 Kona Driver version 2
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9 Replies
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Do the artifacts look like a plaid pattern? I found this too and I haven’t heard back from AJA with a fix. I don’t think it’s an AJA problem though, it seems to be a codec problem. AJA said they were going to ‘pass it back’ to the engineers for a fix and I’m not sure if they meant AJA’s or Apple’s engineers. It happened to me on clips that were scaled and all clips that weren’t scaled were fine and it was only in the highlights for me as well. This particular project was shot on a white BG so it’s been rough. I was working in 720p 10 bit. The fix was to render in 8 bit but what’s the point of that? This also only occurred in the monitor, all exports and renders looked great in quicktime.
Jeremy
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Jeremy
That’s exactly the problem I have got rendering either in RGB or 8-bit solves the problem but takes me away from the 10-bit purist world.
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can you change the render preferences to render all 10-bit instead of yuv 32-bit precision?
Does it work then? or only in 8-bit?
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Yeah, I don’t know what to tell you except it’s a bug and I don’t know where it’s coming from. What I would do is call AJA, tell them that you have found a bug and see what they say. I sent them some sample media and they could recreate the problem. The more people that call the faster it might get pushed up the fix-it train. My hunch, though, that it’s an FCP and not AJA problem.
530.271.3190
Jeremy
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Hey Malcolm,
Re our discussion earlier i really think the problem most likely lies in the Kona drivers. They only have support for FCP 5.1 in V3.X of the drivers and not in V2. I know you said they were unwilling to upgrade as they run from a SAN but these drivers will have absolutly inpact on it. – I would really recommend updating the Kona3 drivers to the current version: Version 3.3When we get a bit of quiet time here i’ll run some tests! All the best
Josh
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I have a Kona 2 and the most recent drivers did not help. I do not know about the Kona 3.
Jeremy
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are you also running FCP 5.1.X ?
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Yep.
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JeremyG/Josh/Boris
I have upgraded to Kona 3 drivers to version 3.3 and artifacts are still there. They only appear when the shot is first re-sized, graded using FCP color corrector (eg increase luma by a large amount)and then rendered. The problem is on the analog/SDI video ouput on grade 1 + client monitor the FCP’s Apple display in the FCP’s canvas looks ok. You are right it does look like a incompatibility problem with FCP Version 5.1.2 and all existing Kona 3 drivers (upto version 3.3) I have contacted AJA and they are going to look into problem. I will let you all know the feed back. Cheers Malcolm
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